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Homemade Crumb Cake Recipe – Buttery, Soft, and Packed with Cinnamon Streusel

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A soft, buttery cake layered with rich cinnamon crumb topping — perfect for breakfast, dessert, or a cozy afternoon treat.

Ingredients

Scale

Crumb Topping:

  • 1 3/4 cups all-purpose flour

  • 1/2 cup brown sugar

  • 1/2 cup granulated sugar

  • 1 1/2 teaspoons cinnamon

  • 1/4 teaspoon salt

  • 1/2 cup (1 stick) unsalted butter, melted

Cake:

  • 2 cups all-purpose flour

  • 1 teaspoon baking powder

  • 1/2 teaspoon baking soda

  • 1/4 teaspoon salt

  • 1/2 cup (1 stick) unsalted butter, softened

  • 3/4 cup granulated sugar

  • 2 large eggs

  • 1 cup sour cream

  • 1 1/2 teaspoons vanilla extract

Instructions

  • Preheat oven to 350°F (175°C). Grease and line a 9×13 or 8×8 baking pan.

  • Mix crumb topping ingredients in a bowl until clumpy. Chill briefly.

  • Cream butter and sugar until fluffy. Add eggs one at a time, then vanilla.

  • In another bowl, whisk flour, baking powder, baking soda, and salt.

  • Add dry ingredients alternately with sour cream to the creamed mixture.

  • Spread batter in pan. Top evenly with crumb mixture, pressing gently.

  • Bake 35–45 minutes or until toothpick comes out clean.

  • Cool in pan before slicing. Dust with powdered sugar if desired.

Notes

  • Add nuts or fruit for variation

  • Store covered at room temperature for 3–4 days

  • Freeze up to 2 months, well wrapped